Finding the Fourth Proportional to 118,253.52, 163,188.54 and 64,538.10

Step by Step Solution

1. Step 1: Write the proportion equation
   118,253.52 : 163,188.54 = 64,538.10 : x
2. Step 2: Convert to fraction form
   118,253.52/163,188.54 = 64,538.10/x
3. Step 3: Cross multiply
   118,253.52x = 163,188.54 × 64,538.10
4. Step 4: Simplify right side
   118,253.52x = 10,531,878,313.37
5. Step 5: Solve for x
   x = 10,531,878,313.37/118,253.52
6. Step 6: Final answer
   x = 89,061.86